package com.itheima.service;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.Set;

/**
 * 权限安全
 */
@Component
public class SpringSecurityUserService implements UserDetailsService {
    @Reference
    private UserService userService;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        //根据前台传的用户名拿到角色
        User user = userService.findByUsername(username);
        if (user ==null){
            return null;
        }
        Set<Role> roles = user.getRoles();
        //创建一个存储权限的集合
        ArrayList<SimpleGrantedAuthority> list = new ArrayList<>();
        if (roles !=null){
            for (Role role : roles) {
                list.add(new SimpleGrantedAuthority(role.getKeyword()));
                Set<Permission> permissions = role.getPermissions();
                if (permissions!=null){
                    for (Permission permission : permissions) {
                        list.add(new SimpleGrantedAuthority(permission.getKeyword()));
                    }
                }
            }
        }
        return new org.springframework.security.core.userdetails.User(username, user.getPassword(), list);
    }
}
